#include <fstream>
#include <string>
#include <vector>
#include <cstdio>
#include "ui/ui_renderer.h"

#include "boot_sequence.h"
#include <SDL3/SDL_timer.h>

BootSequence::BootSequence(void) {
  /* Load boot messages. */
  std::ifstream boot_file("assets/boot_messages.txt");
  if(!boot_file.is_open()) {
    printf("ERROR: Failed to open assets/boot_messages.txt\n");
    _messages.push_back("ERROR: boot_messages.txt not found.");
  } else {
    std::string line;
    while(std::getline(boot_file, line)) {
      if(!line.empty()) {
        _messages.push_back(line);
      }
    }
  }

  /* Init timings. */
  _start_time = SDL_GetTicks();
  _line_interval_ms = 150; /* 150ms between each line. */
  /* Total duration is time for all lines plus a 2-second pause at the end. */
  _total_duration_ms = (_messages.size() * _line_interval_ms) + 2000;
}

BootSequence::~BootSequence(void) {}

bool BootSequence::is_finished(void) {
  return (SDL_GetTicks() - _start_time) >= _total_duration_ms;
}

void BootSequence::render(UIRenderer* ui_renderer) {
  const Color text_color  = { 0.9f, 0.9f, 0.9f }; /* grey/white */
  const float line_height = 18.0f;
  const float padding     = 15.0f;

  Uint32 elapsed_time = SDL_GetTicks() - _start_time;
  int lines_to_show = elapsed_time / _line_interval_ms;

  if(lines_to_show > _messages.size()) {
    lines_to_show = _messages.size();
  }

  for(int i = 0; i < lines_to_show; ++i) {
    float y_pos = padding + (i*line_height);
    ui_renderer->render_text(_messages[i].c_str(), padding, y_pos, text_color);
  }
}